Beryllium bronze leaf spring normal-temperature and high-temperature stress relaxation testing device and testing method thereof

Abstract

The invention provides a beryllium bronze leaf spring normal-temperature and high-temperature stress relaxation testing device and a testing method thereof. A side plate is fixed at the front side of a base of the testing device, a sample is an equal stress sample, which is provided with an opening at one end and is fixed on the upper side of the side plate, the base and the upper plate are fixed together through two limiters, a pressure sensor and a pressure head are fixed under the upper plate, and the pressure head is in line contact with the sample. Based on the testing device, the testing method comprises the following steps of: firstly preparing the equal stress sample, then determining the vertical distance difference between the limiters and the side plate, and arranging the testing device and the sample according to the distance difference; and then carrying out a spring stress relaxation test and acquiring stress values at different time, and determining the stress relaxation loss condition of a beryllium bronze leaf spring sample to be tested after the regulated test time is up. The device disclosed by the invention is simple in design, is not deformed at high temperature, is easy to process and has high measuring precision, the test data is accurate, continuous stress measurement of the beryllium bronze leaf spring test is realized, personal errors are reduced, and the work efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of normal-temperature and high-temperature stress relaxation testing of beryllium bronze leaf springs, and in particular relates to a test device and a measuring method for the normal-temperature and high-temperature stress relaxation of beryllium bronze leaf springs. Background technique [0002] Beryllium bronze has excellent mechanical properties, wear resistance and fatigue resistance, high strength and hardness, excellent electrical conductivity, corrosion resistance, low temperature non-magnetic, non-sparking and excellent process performance. It is widely used in national defense, aviation and instrument and instrument industry. The quality of beryllium bronze is determined by its elastic limit and relaxation stability. Stress relaxation refers to the phenomenon that the stress of an elastic material working under constant strain conditions gradually decreases with time at a certain temperature, that...

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Problems solved by technology

[0004] The present invention solves the problem that the sample is difficult to process and cannot directly reflect the stress relaxation characteristics of the test material in the normal and high temperature stress relaxation test of the beryllium copper sheet spring in the prior art, and the current test method has a low degree of automation. The error is large, and the temperature measurement cannot be realized. A test equipment and measurement method for beryllium bronze leaf spring stress relaxation at normal temperature and high temperature are provided.

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